<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>分组选择器</title>
    <style>
        /*
        div,p,h1{}分组选择器
        */
        div,p,h1{
            color:red;
        }
    </style>
</head>
<body>
    <div>div</div>
    <p>p</p>
    <h1>h1</h1>
</body>
</html>